Added volume control

Author: RadAd

AudioPlayer.cpp

@@ -66,6 +66,7 @@ BOOL PlayerDlgOnInitDialog(HWND hDlg, HWND hWndFocus, LPARAM lParam)
     SetWindowLongPtr(hDlg, DWLP_USER, (LONG_PTR) pData);
 
     const HWND hPosition = GetDlgItem(hDlg, IDC_POSITION);
+    const HWND hVolume = GetDlgItem(hDlg, IDC_VOLUME);
 
     GetWindowText(hDlg, pData->strTitle, ARRAYSIZE(pData->strTitle));
 
@@ -80,6 +81,11 @@ BOOL PlayerDlgOnInitDialog(HWND hDlg, HWND hWndFocus, LPARAM lParam)
     TrackBar_SetTicFreq(hPosition, 60);
     TrackBar_SetLineSize(hPosition, 10);
     TrackBar_SetPageSize(hPosition, 60);
+    TrackBar_SetTicFreq(hVolume, 10);
+    TrackBar_SetLineSize(hVolume, 1);
+    TrackBar_SetPageSize(hVolume, 10);
+    TrackBar_SetRange(hVolume, 0, 100);
+    TrackBar_SetPos(hVolume, 100 - 100);
 
     for (int i = 1; i < __argc; ++i)
     {
@@ -199,6 +205,7 @@ void PlayerDlgOnAPOpen(HWND hDlg, LPCTSTR pFileName)
 {
     PlayerDlgData* pData = (PlayerDlgData*) GetWindowLongPtr(hDlg, DWLP_USER);
     const HWND hPosition = GetDlgItem(hDlg, IDC_POSITION);
+    const HWND hVolume = GetDlgItem(hDlg, IDC_VOLUME);
     const HWND hBegin = GetDlgItem(hDlg, IDC_BEGIN);
     const HWND hEnd = GetDlgItem(hDlg, IDC_END);
 
@@ -215,6 +222,9 @@ void PlayerDlgOnAPOpen(HWND hDlg, LPCTSTR pFileName)
         FormatTime(dwLength, buf, ARRAYSIZE(buf));
         SetWindowText(hEnd, buf);
 
+        DWORD dwVolume = 100 - TrackBar_GetPos(hVolume);
+        MciSetVolume(hDlg, pData->wDeviceID, dwVolume * 10);
+
         MciPlay(hDlg, pData->wDeviceID);
     }
     else
@@ -235,10 +245,12 @@ BOOL PlayerDlgOnNotify(HWND hDlg, int id, LPNMHDR pNmHdr)
 {
     PlayerDlgData* pData = (PlayerDlgData*) GetWindowLongPtr(hDlg, DWLP_USER);
     const HWND hPosition = GetDlgItem(hDlg, IDC_POSITION);
+    const HWND hVolume = GetDlgItem(hDlg, IDC_VOLUME);
     const HWND hBegin = GetDlgItem(hDlg, IDC_BEGIN);
 
-    if (id == IDC_POSITION)
+    switch (id)
     {
+    case IDC_POSITION:
         switch (pNmHdr->code)
         {
         case NM_RELEASEDCAPTURE:
@@ -281,14 +293,47 @@ BOOL PlayerDlgOnNotify(HWND hDlg, int id, LPNMHDR pNmHdr)
             break;
         }
         return TRUE;
-    }
-    else
+
+    case IDC_VOLUME:
+        switch (pNmHdr->code)
+        {
+        case NM_RELEASEDCAPTURE:
+            if (pData->wDeviceID != 0)
+            {
+                DWORD dwVolume = 100 - TrackBar_GetPos(hVolume);
+                MciSetVolume(hDlg, pData->wDeviceID, dwVolume * 10);
+            }
+            break;
+
+        case TRBN_THUMBPOSCHANGING:
+            if (pData->wDeviceID != 0)
+            {
+                const NMTRBTHUMBPOSCHANGING* pPosChanging = (NMTRBTHUMBPOSCHANGING*) pNmHdr;
+                DWORD dwPos = 100 - pPosChanging->dwPos;
+                if (dwPos > (MAXDWORD / 2)) dwPos = 0;
+                if (dwPos > 100) dwPos = 100;
+                if (pPosChanging->nReason == TB_THUMBTRACK)
+                {
+                    MciSetVolume(hDlg, pData->wDeviceID, dwPos * 10);
+                }
+                else if (pPosChanging->nReason != TB_THUMBPOSITION && pPosChanging->nReason != TB_ENDTRACK)
+                {
+                    MciSetVolume(hDlg, pData->wDeviceID, dwPos * 10);
+                }
+            }
+            break;
+        }
+        return TRUE;
+
+    default:
         return FALSE;
+    }
 }
 
 void PlayerDlgOnAppCommand(HWND hDlg, HWND hChild, UINT cmd, UINT uDevice, DWORD dwKeys)
 {
     PlayerDlgData* pData = (PlayerDlgData*) GetWindowLongPtr(hDlg, DWLP_USER);
+    const HWND hVolume = GetDlgItem(hDlg, IDC_VOLUME);
     switch (cmd)
     {
     case APPCOMMAND_MEDIA_PLAY:
@@ -306,6 +351,24 @@ void PlayerDlgOnAppCommand(HWND hDlg, HWND hChild, UINT cmd, UINT uDevice, DWORD
                 MciPlay(hDlg, pData->wDeviceID);
         }
         break;
+    case APPCOMMAND_VOLUME_DOWN:
+        {
+            DWORD dwVolume = 100 - TrackBar_GetPos(hVolume);
+            dwVolume -= 10;
+            if (dwVolume > (DWORD) -100) dwVolume = 0;
+            MciSetVolume(hDlg, pData->wDeviceID, dwVolume * 10);
+            TrackBar_SetPos(hVolume, 100 - dwVolume);
+        }
+        break;
+    case APPCOMMAND_VOLUME_UP:
+        {
+            DWORD dwVolume = 100 - TrackBar_GetPos(hVolume);
+            dwVolume += 10;
+            if (dwVolume > 100) dwVolume = 100;
+            MciSetVolume(hDlg, pData->wDeviceID, dwVolume * 10);
+            TrackBar_SetPos(hVolume, 100 - dwVolume);
+        }
+        break;
     }
 }
 

AudioPlayer.rc

@@ -1,5 +1,10 @@
 #include <Windows.h>
 #include "MciUtils.h"
+#include <stdio.h>
+#include <tchar.h>
+
+// TODO Use a different alias for each open
+#define DEF_ALIAS _T("music")
 
 static void MciShowError(HWND hDlg, MCIERROR e)
 {
@@ -32,7 +37,8 @@ MCIERROR MciOpen(HWND hDlg, MCIDEVICEID& wDeviceID, LPCTSTR pFileName)
     MCI_OPEN_PARMS op = {};
     op.dwCallback = MAKELONG(hDlg, 0);
     op.lpstrElementName = pFileName;
-    MCIERROR e = mciSendCommand(wDeviceID, MCI_OPEN, MCI_WAIT | MCI_OPEN_ELEMENT, (DWORD_PTR) &op);
+    op.lpstrAlias = DEF_ALIAS;
+    MCIERROR e = mciSendCommand(wDeviceID, MCI_OPEN, MCI_WAIT | MCI_OPEN_ELEMENT | MCI_OPEN_ALIAS, (DWORD_PTR) &op);
     if (e != MMSYSERR_NOERROR)
     {
         //MciClose(hDlg, op.wDeviceID);
@@ -77,3 +83,18 @@ void MciSeekTo(HWND hDlg, MCIDEVICEID wDeviceID, DWORD dwTo)
     if (e != MMSYSERR_NOERROR)
         MciShowError(hDlg, e);
 }
+
+void MciSetVolume(HWND hDlg, MCIDEVICEID wDeviceID, DWORD dwVolume)
+{
+    TCHAR buffer[1024];
+    _stprintf_s(buffer, ARRAYSIZE(buffer), _T("setaudio %s volume to %d"), DEF_ALIAS, dwVolume);
+
+    TCHAR ret[1024];
+    MCIERROR e = mciSendString(buffer, ret, ARRAYSIZE(ret), hDlg);
+    if (e != MMSYSERR_NOERROR)
+        MciShowError(hDlg, e);
+#if 0
+    if (ret[0] != _T('\0'))
+        _ftprintf(stdout, _T("%s\n"), ret);
+#endif
+}

MciUtils.cpp

@@ -8,3 +8,4 @@ DWORD_PTR MciGetStatus(HWND hDlg, MCIDEVICEID wDeviceID, DWORD dwItem);
 void MciPlay(HWND hDlg, MCIDEVICEID wDeviceID);
 void MciPause(HWND hDlg, MCIDEVICEID wDeviceID);
 void MciSeekTo(HWND hDlg, MCIDEVICEID wDeviceID, DWORD dwTo);
+void MciSetVolume(HWND hDlg, MCIDEVICEID wDeviceID, DWORD dwVolume);